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Littérature scientifique sur le sujet « Grout modelling »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Grout modelling"

Fu, Yanbin, Xiuling Wang, Sizhan Zhang et Yong Yang. « Modelling of Permeation Grouting considering Grout Self-Gravity Effect : Theoretical and Experimental Study ». Advances in Materials Science and Engineering 2019 (27 novembre 2019) : 1–16. http://dx.doi.org/10.1155/2019/7968240.

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Self-gravity is one key parameter for behavior characterization of grout permeation and diffusion. This study proposes mathematical models for permeation grouting with consideration of grout self-gravity effect. The models concerning power law, Bingham, and Newtonian grouts are based on the generalized Darcy’s law and spherical diffusion theory. In addition, a prediction model of grout concretion dimension used for Bingham grout was developed. An analysis of the injection pressure distribution law and a comparative evaluation of diffusion radius considering self-gravity effect using established models were conducted subsequently. Moreover, grouting experiments were performed to check and verify the prediction model. The experimental results showed that injection pressure decreases linearly with increase of diffusion radius for the power-law grout, while nonlinear decrease of injection pressure was confirmed in Bingham and Newtonian grouts in this case. Three grouts approximately diffuse in an “ellipsoidal” shape, and it is confirmed that the diffusion radius is closely related to grout self-gravity. The Newtonian grout produces the maximum diffusion radius compared with the other two grouts whether the gravity effects were considered or not. The grout quantity under a smaller water-to-cement w/c ratio exhibits a significant difference and undergoes two increasing stages, whereas the quantity simply tends to be stable after it reaches its maximum in terms of the larger w/c ratios. The constructed dimension prediction model agrees well with the experimental results, which can be helpful for design and assessment of the grouting scheme.

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Saiyouri, N., L. Jason, O. Chupin et P. Y. Hicher. « Modelling and acoustic monitoring of grout propagation in sands ». Proceedings of the Institution of Civil Engineers - Ground Improvement 161, n^o 3 (août 2008) : 143–52. http://dx.doi.org/10.1680/grim.2008.161.3.143.

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Blom, C. B. M., J. J. M. Schillings et P. S. Jovanovic. « Modelling structural grout load for the tunnel lining analysis ». IABSE Symposium Report 87, n^o 8 (1 janvier 2003) : 42–48. http://dx.doi.org/10.2749/222137803796329709.

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Ceroni, Francesca, et Thomas Celano. « Modelling of Bond Behavior of Injected Anchors in Masonry Elements ». Key Engineering Materials 817 (août 2019) : 126–33. http://dx.doi.org/10.4028/www.scientific.net/kem.817.126.

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The paper focuses attention on the performance of injected anchors embedded in masonry elements. The bond behaviour is investigated by means of a three-dimensional Finite Element model aimed to assess the global strength capacity of the injected anchors and to investigate the stresses distribution in the masonry element when some meaningful parameters change. Along the anchor-grout and grout-masonry interfaces, nonlinear bond laws have been assumed. Such laws have been assessed by comparing the FE model outcomes with the experimental results of pull-out tests carried out on ribbed steel bars embedded by means of lime-based grout in prisms made of tuff stones

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Liaqat, A., S. Safdar et M. A. Sheikh. « Finite-element modelling of thermo-mechanical stress distribution in laser beam ceramic tile grout sealing process ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 220, n^o 10 (1 octobre 2006) : 1497–508. http://dx.doi.org/10.1243/0954406jmes143.

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Laser tile grout sealing is a special process in which voids between the adjoining ceramic tiles are sealed by a laser beam. This process has been developed by Lawrence and Li using a customized grout material and a high power diode laser (HPDL). The process has been optimally carried out at laser powers of 60–120 W and at scanning speeds of 3–15 mm/s. Modelling of the laser tile grout sealing process is a complex task as it involves a moving laser beam and five different materials: glazed enamel, grout material, ceramic tile, epoxy bedding, and ordinary Portland cement substrate. This article presents the finite element model (FEM) of the laser tile grout sealing process. The main aim of this model is to accurately predict the thermo-mechanical stress distribution induced by the HPDL beam in the process. For an accurate representation of the process, the laser was modelled as a moving heat source. A three-dimensional transient thermal analysis was carried out to determine the temperature distribution. Temperature-dependent material properties and latent heat effects, due to melting and solidification of the glazed enamel, were taken into account in the FEM, thereby allowing a more realistic and accurate thermal analysis. The results of the thermal analysis were used as an input for the stress analysis with temperature-dependent mechanical properties. The results obtained from the FEM are compared with the published experimental results.

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Gao, Yue, et Wang Hua Sui. « Modelling of chemical grout column permeated by water in transparent soil ». International Journal of Environment and Pollution 59, n^o 2/3/4 (2016) : 142. http://dx.doi.org/10.1504/ijep.2016.079906.

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Malena, Marialaura, Marialuigia Sangirardi et Gianmarco de Felice. « Steel Reinforced Grout under uniaxial load : Experimental evidences and numerical modelling ». Construction and Building Materials 227 (décembre 2019) : 116808. http://dx.doi.org/10.1016/j.conbuildmat.2019.116808.

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Hassanieh, A., H. R. Valipour et M. A. Bradford. « Bolt shear connectors in grout pockets : Finite element modelling and parametric study ». Construction and Building Materials 176 (juillet 2018) : 179–92. http://dx.doi.org/10.1016/j.conbuildmat.2018.05.029.

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Coskun, S. B., et T. Tokdemir. « Modelling of Permeation Grouting Through Soils ». Journal of Applied Engineering Sciences 10, n^o 1 (1 mai 2020) : 11–16. http://dx.doi.org/10.2478/jaes-2020-0003.

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AbstractIn this study, mathematical modeling of permeation grouting through fully saturated soil is proposed based on immiscible multiphase flow theory. Grout flow in the medium is modeled together with the existing water as the simultaneous flow of two immiscible fluids. In the model, the porous medium is assumed as isotropic and rigid, fluids are assumed as incompressible and capillary pressure is assumed as negligible. Governing equations are discretized using upstream weighted finite element technique and results show that, proposed models give good results and may be used in the numerical simulation of grouting through fully saturated soils.

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Thèses sur le sujet "Grout modelling"

GRASSI, DAVIDE. « Tecnologie innovative per il consolidamento di substrati di fondazione e opere geotecniche ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/366246.

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The PhD research activities are focused on ground improvement application. The objective is to study the permeation grouting technique in granular soils and to understand the hydro-mechanical properties that can be obtained using non-conventional injection materials. During the project it has been developed an injection apparatus and a monitoring system of the grouting process that is used to study the permeation process and to develop a theoretical, and then analytical and numerical approach. Furthermore, the injection apparatus is used to simulate the permeation of different injection materials in soils and to generate specimen for hydraulic and mechanical evaluations. The experimental set-up comprises of a polycarbonate extruded clear tube, 50 mm in inner diameter and variable length (with a maximum of 1.6 m), and two floating caps at the extremities with a double sealing system. Once it has been filled with a selected soil it is inserted in a rigid steel chassis and the hole injection system can support 100 bar injection pressure. To simulate the soil micro-mechanical behavior has been created a loading system, composed by a screw that can apply a confining pressure on the soil sample. The column is then instrumented: • two load cells to control the confining pressure; • five pressure transducers to control the imposed pressure; • two pressure switches to impose pressure to the fluid; • laser ranging distance sensors to measure the flow rate; • vision camera to detect fluid front advancement. The data from the sensors are collected by employing Arduino processors and all the results are elaborated and displayed in real time with a Labview platform software. Some of the sensors were properly calibrated after being installed and all the measurements and the injection apparatus are validated before starting the test. The injection apparatus has been used to test different conventional and non-conventional grout with different rheological properties: sodium silicate, acrylic resin, colloidal silica, cement and micro-cement grout. For some of the previous injection materials have been defined a rheological time-dependent law. All these tests have been used to understand the permeation phenomena and to define an analytical and numerical predictive model that could be valid for all the soil in all conditions. By using this approach and by knowing the soil hydraulic properties, related to a new geotechnical project, it should be possible to indicate to designers the type of grout, the injection parameters and the injection geometry for this specific ground improvement application. Finally, a hydro-mechanical investigation of the different injection materials has been performed, consisting of the following test: permeability, unconfined compressive strength, triaxial test and brasilian test. For each injection test it has been evaluated the difference mechanical behavior from the bottom to the top part of the column, resulting from a variable soil saturation during the permeation process, that, in a ground with a grout spherical propagation, can be related to the radial distance from the injection point. Furthermore, a mechanical comparison, in term of friction angle and cohesion, is performed for the different grout types and, for some of them, at different curing time.
The PhD research activities are focused on ground improvement application. The objective is to study the permeation grouting technique in granular soils and to understand the hydro-mechanical properties that can be obtained using non-conventional injection materials. During the project it has been developed an injection apparatus and a monitoring system of the grouting process that is used to study the permeation process and to develop a theoretical, and then analytical and numerical approach. Furthermore, the injection apparatus is used to simulate the permeation of different injection materials in soils and to generate specimen for hydraulic and mechanical evaluations. The experimental set-up comprises of a polycarbonate extruded clear tube, 50 mm in inner diameter and variable length (with a maximum of 1.6 m), and two floating caps at the extremities with a double sealing system. Once it has been filled with a selected soil it is inserted in a rigid steel chassis and the hole injection system can support 100 bar injection pressure. To simulate the soil micro-mechanical behavior has been created a loading system, composed by a screw that can apply a confining pressure on the soil sample. The column is then instrumented: • two load cells to control the confining pressure; • five pressure transducers to control the imposed pressure; • two pressure switches to impose pressure to the fluid; • laser ranging distance sensors to measure the flow rate; • vision camera to detect fluid front advancement. The data from the sensors are collected by employing Arduino processors and all the results are elaborated and displayed in real time with a Labview platform software. Some of the sensors were properly calibrated after being installed and all the measurements and the injection apparatus are validated before starting the test. The injection apparatus has been used to test different conventional and non-conventional grout with different rheological properties: sodium silicate, acrylic resin, colloidal silica, cement and micro-cement grout. For some of the previous injection materials have been defined a rheological time-dependent law. All these tests have been used to understand the permeation phenomena and to define an analytical and numerical predictive model that could be valid for all the soil in all conditions. By using this approach and by knowing the soil hydraulic properties, related to a new geotechnical project, it should be possible to indicate to designers the type of grout, the injection parameters and the injection geometry for this specific ground improvement application. Finally, a hydro-mechanical investigation of the different injection materials has been performed, consisting of the following test: permeability, unconfined compressive strength, triaxial test and brasilian test. For each injection test it has been evaluated the difference mechanical behavior from the bottom to the top part of the column, resulting from a variable soil saturation during the permeation process, that, in a ground with a grout spherical propagation, can be related to the radial distance from the injection point. Furthermore, a mechanical comparison, in term of friction angle and cohesion, is performed for the different grout types and, for some of them, at different curing time.

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Mazzon, Nicola. « Infuence of Grout Injection on the Dynamic Behaviour of Stone Masonry Buildings ». Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3422728.

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The Italian and European regions are characterized by a wide diﬀusion of structures in the minor historical centres. The decay condition, in which part these buildings are, makes often necessary structural interventions to preserve they integrity. This way, during last decades several new intervention methodologies were developed, employing both innovative and traditional materials, with the aim to avoid further damages, particularly those induced by seismic events. However, these new materials and techniques are often commercialized and employed without any preliminary exhaustive study to verify their applicability and their eﬀectiveness. The present research joins in this contest considering the multi-leaf stone masonries, one of the most diﬀuse structural systems widely employed on minor historical buildings. This masonry typology is constituted by more approached leaves and it is characterized by a high percentage of internal voids. Furthermore, the employment of hydraulic lime-based grout injection is also considered as strengthening technique suitable for this masonry typology. This study aims to validate the application of this intervention methodology, widely applied since many years employing materials diﬀerent for chemical composition, trough an extensive experimental campaign and a subsequent numerical modelling. First experimental phase involves a series of dynamic tests on whole building models, considering a reducing scale factor, realized with multi-leaf stone masonry, subsequently strengthened trough injection of grout. The execution of these shaking table tests allowed to evaluate the inﬂuence of the considered strengthening technique on the overall dynamic behaviour of the injected structure. Furthermore, also the increasing of strength and the seismic response of the building models could be evaluated. A complementary experimental phase involved several further quasi-static laboratory tests tests on single structural elements. Compression tests allowed to study the strength increasing of this elements as well as their failure mechanisms after the grout injection. Further shear compression tests provided important informations about the mechanical behaviour of single structural elements subjected to in-plane cyclic forces. Finally, a numerical modelling of the mechanical behaviour of specimens subjected to compression load was developed. This analysis allowed to deepen the study of the stress distribution and of the failure mechanisms of single structural elements subjected to strengthening trough grout injection.
Il territorio italiano, così come quello europeo, è caratterizzato da un’ampia diﬀusione di strutture appartenenti all’edilizia storica minore. Lo stato di degrado, in cui talvolta si trovano tali ediﬁci, rende spesso necessari interventi strutturali volti a garantirne l’integrità. In tale senso, negli ultimi decenni sono state sviluppate nuove metodologie d’intervento, sfruttando sia di materiali tradizionali che innovativi, per preservare tali strutture da ulteriori danni, in particolare quelli indotti da eventi sismici. Tuttavia, nuovi materiali e tecniche d’intervento vengono spesso commercializzati ed applicati senza l’esecuzione di un esaustivo studio preliminare che ne veriﬁchi l’applicabilità e l’eﬃcacia. La presente ricerca si inserisce in questo contesto prendendo in considerazione le murature multi-strato in pietra, una delle tipologie costruttive maggiormente impiegate nell’edilizia storica minore. Tale muratura è costituita da più paramenti accostati ed è caratterizzata da un’alta percentuale di vuoti interni. Inoltre, si considera l’impiego dell’iniezione di miscela, a base di calce idraulica naturale, come tecnica di consolidamento applicabile a tale tipologia muraria. Lo studio si propone di validare l’impiego di questa metodologia d’intervento, già da tempo ampiamente utilizzata sfruttando materiali di diversa composizione chimica, mediante la realizzazione di un’ampia campagna sperimentale e di una successiva modellazione numerica. La prima fase sperimentale comprende una serie di prove dinamiche su modelli di ediﬁcio, in scala ridotta, realizzati in muratura multi-strato di pietra, successivamente sottoposta ad iniezione di miscela. L’esecuzione di tali prove su tavola vibrante ha permesso di valutare l’inﬂuenza della tecnica di consolidamento considerata sul comportamento dinamico globale della struttura su cui si interviene. Inoltre, si è potuto valutare l’incremento di resistenza oltre che la variazione della risposta sismica dei modelli di ediﬁcio. Una complementare fase sperimentale ha coinvolto numerose ed ulteriori prove di laboratorio, realizzate in ambito quasi-statico, su singoli elementi strutturali.L’esecuzione di prove di compressione ha permesso di veriﬁcare sia l’incremento di resistenza di tali elementi strutturali che la variazione delle loro modalità di rottura a seguito dell’iniezione di miscela legante. Ulteriori prove di taglio e compressione hanno fornito importanti indicazioni riguardo al comportamento meccanico di singoli elementi strutturali soggetti a forze cicliche nel piano. Inﬁne, si è sviluppata una modellazione numerica del comportamento meccanico di campioni sottoposti a carico di compressione monoassiale. Quest'analisi ha dunque permesso di approfondire lo studio della distribuzione delle tensioni e delle modalità di rottura di singoli elementi strutturali, soggetti ad intervento di consolidamento mediante iniezioni di miscela legante.

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Hennessy, Phillippa. « Modelling group communication ». Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291732.

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Ford, Peter S. « Development of crystallographic surfaces for modelling interactions ». Thesis, Durham University, 1997. http://etheses.dur.ac.uk/4776/.

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This thesis addresses two separate problems - an investigation of the interaction of probe molecules with crystalline rutile and an investigation of the environment of group IA and IIA elements in organometallic compounds. Ab-initio Hartree-Fock calculations have been performed, aimed at investigating the interactions between the ionic surface of a crystal and an adsorbate molecule. Titanium dioxide, a material important for catalysis, electronic components and pigments, was chosen as the substrate, with carbon monoxide as the probe molecule. The calculations were carried out using the Crystal92 program, for the (110) surface of the Rutile polymorph of TiO(_2), employing a slab with a thickness of 5 atomic layers. The calculations investigated two orientations of the CO molecule with the molecular axis perpendicular to the surface. Results are reported showing contour diagrams for slices through the energy hypersurface parallel and perpendicular to the surface of the substrate. In order to facilitate the work described above, a program 'Builder2' was developed. This provides a convenient means for generating models of slabs of material from crystal structure data. Part of the development of Builder2 was to devise computer code to decompose standard Space Group symbols into the underlying symmetry matrices. The code for Builder2 is proprietary to Oxford Materials Ltd. and forms part of a commercial product. The environment of group IA and IIA elements in crystalline materials has not been the subject of any reported investigation. These elements, and organic ligands associated with them, play a significant role in biological systems. Around 16,000 atomic environments were extracted from the Cambridge Crystallographic Database to provide an up-to-date analysis of actual environments. The results are presented as histograms and tables, and suggestions are made for future extension of the analyses.

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France, Emma F. « Modelling the multi in multi-party multimedia communication ». Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321996.

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Subramanya, Shreyasu. « Modelling and Simulation of Fan Performance using CFD Group ». Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171106.

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Performance of vacuum cleaners are affected by factors such static pressure, airflow rate and efficiency. In this thesis work, attempt has been made to design a fan to meet the requirements of suction static pressure and air flow rate and in the process understand the fan design parameters that affect these performance parameters. Parametric study has been conducted for the same, by choosing six fan design parameters. Additionally, ways to increase the fan efficiency has been investigated during the parametric study. Computational Fluid Dynamics is used to visualize the flow inside the fan casing and further to simulate fan performance at an operational point. Steady state RANS and moving reference frames was used to model the turbulence in the fluid flow and rotation of the fan, respectively. Performance curve showing the relation between static suction pressure and mass flow rate is plotted for the base model is in proximity to the required performance. Parametric study was conducted on the six fan design parameters: Fan diameter, number of impeller blades, blade outlet angle, radius of the curve connecting inlet to outlet section of the fan, diffuser exit length and splitter blade length. The range for each parameter analysis was restricted so that static pressure values are around the required performance. Greater performance variation was found with design parameters: fan diameter, blade outlet angle, radius of the curve connecting inlet to outlet section of the fan and diffuser exit length. This variation at low mass flow rate can be majorly attributed to the randomness in the flow captured by entropy contours. At high mass flow rate, blockage in the flow visualized by pressure contours reasoned for the performance variation. Greater performance variation was not when design parameters such as number of blades and splitter blade length were varied. Larger variation of these parameters is required to see better variation.

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Hu, Wei. « Physical modelling of group behaviour of stone column foundations ». Thesis, Connect to e-thesis, 1995. http://theses.gla.ac.uk/817/.

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Thesis (Ph.D.) - University of Glasgow, 1995.
Ph.D. thesis submitted to the Faculty of Engineering, Department of Civil Engineering, Unversity of Glasgow, 1995. Includes bibliographical references. Print version also available.

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Fujita, Naomi. « Modelling of point and extended defects in Group IV semiconductors ». Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/90563.

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In this thesis first-principles calculations of point and extended defects in diamond and silicon are reported. In single crystal diamond grown by chemical vapour deposition (CVD) dislocations are observed as mixed-type 45° and edge-type dislocations lying along <100> with 1/2<110> Burgers vectors. Results are presented on the core structures, core energies and electrical properties of both types of dislocations and their interaction with nitrogen is investigated. Then the focus turns to the brown diamond problem. Despite concerted research efforts, the origin of the brown colouration of diamond is still under discussion. Recently, the attention was drawn to vacancy-related defects. Experiments on type IIa diamonds indicate that the brown colour is caused by vacancy-type extended defects, however the shape and size of these defects remained unclear. In this work, the structural, electrical and optical properties of large spherical vacancy clusters and thin vacancy disks are investigated by means of density functional theory and the calculations are compared with recent experimental measurements on brown diamond. High pressure high temperature treatment (HPHT) of brown type Ia diamonds above 2000°C results in the loss of the brown colour and the formation of nitrogen-vacancy defects. The generation of such defects requires a source of mobile vacancies during the annealing process. It is suggested that the vacancy cluster model described in this thesis can explain the observed annealing behaviour since the break-up of the clusters leads to a supersaturation of mobile vacancies which readily complex with substitutional nitrogen atoms present in the material. Therefore, the effect of HPHT treatment of brown type Ia diamond is investigated by studying the formation energies of common and rare defects and estimates of their equilibrium concentrations at different annealing stages are given. Finally, an open problem also involving nitrogen, but in a different group IV semiconductor is considered. In Czochralski-silicon, nitrogen-related shallow thermal donors are formed between 500 and 750°C. Until now the exact chemical composition and atomic structure of these defects are not well established. Here, it is shown that NO and NO_2 belong to the family of nitrogen-oxygen related shallow thermal donors. Based on the law of mass action the equilibrium defect concentrations are predicted. Finally, the theoretical results are compared to recent Fourier transform infrared (FTIR) spectroscopy measurements.

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Padilha, Emiliano Gomes. « Modelling turn-taking in a simulation of small group discussion ». Thesis, University of Edinburgh, 2006. http://hdl.handle.net/1842/1679.

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The organization of taking turns at talk is an important part of any verbal interaction such as conversation, particularly in groups. Sociologists and psycholinguists have been studying turn-taking in conversation through empirical and statistical analysis, and identified some systematics in it. But to my knowledge no detailed computational modelling of verbal turn-taking has yet been attempted. This thesis describes one such attempt, for a simulation of small group discussion— that is, engaged conversation in groups of up to seven participants, which researchers have found to be much like two-person dialogues with overhearers. The group discussion is simulated by a simple multi-agent framework with a blackboard architecture, where each agent represents a participant in the discussion and the blackboard is their channel of communication, or ‘environment’ of the discussion. Agents are modelled with just a set of probabilistic parameters that give their likelihood of doing the various turn-taking decisions in the simulation: when to talk, when to continue talking, when to interrupt, when to give feedback (“uh huh”), and so on. The simulation, therefore, consists of coordinating a one-at-a-time talk (symbolic talk) with speaker transitions, hesitation, yielding or keeping the floor, and managing simultaneous talk which occurs mostly around speaker transitions. The turn-taking modelling considers whether participants are talking or not, and when they reach points of possible completion in their utterances that correspond to the places of transition-relevance, TRPs, where others could start to speak in attempts to take a new turn of talk. The agent behaviours (acts), their internal states and procedures are then described. The model is expanded with elaborate procedures for the resolution of simultaneous talk, for speaking hesitations and their potential interruption, and for the constraints of the different ‘sorts’ of utterance with respect to turn-taking: whether the TRP is free, or the speaker has selected someone to speak next, has encouraged anyone to speak, or has indicated the course of an extended multi-utterance turn at talk as in sentence beginnings like “first of all,” or “let me tell you something:. . . ”. The model and extensions are then comprehensively analysed through a series of large quantitative evaluations computing various aggregate statistics such as: the total times of single talk, multiple talk and silences; total occurrences of utterances, silences, simultaneous talk, multiple starts, middle-of-utterance attempts at talking, false-starts, abandoned utterances (interrupted by others), and more.

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Cheng, Lin. « Modelling airport passenger group dynamics using an agent-based method ». Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/72999/1/Lin_Cheng_Thesis.pdf.

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This thesis investigates the influence of passenger group dynamics on passengers' behaviour in an international airport. A simulation model is built to analyse passengers' behaviour during airport departure processes and during an emergency event. Results from the model showed that passengers' group dynamics have significant influences on the performance and utilisation of airport services. The agent-based model also provides a convenient way to investigate the effectiveness of space design and service allocations, which may contribute to the enhancement of passenger airport experiences.

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Livres sur le sujet "Grout modelling"

Dutré, W. L. European modelling group for solar systems. Luxembourg : Commission of the European Communities, 1986.

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David, Porter. Group interaction modelling of polymer properties. New York : M. Dekker, 1995.

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Debosscher, A. European modelling group for solar systems. Luxembourg : Commission of the EuropeanCommunities, 1985.

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National Institute of Hydrology (India), dir. Mathematical modelling of flow from a group of springs. Roorkee, U.P., India : National Institute of Hydrology, 1993.

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Bogner, William C. Modelling competitive dynamics of strategic group impacts on strategy forumlation. [Urbana, Ill.] : College of Commerce and Business Administration, University of Illinois at Urbana-Champaign, 1990.

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Balslev-Olesen, O. European modelling group solar space heating and domestic hot water systems. Luxembourg : Commission of the European Communities, 1985.

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Lockett, Alan Geoffrey. An application of judgmental modelling in the social services. Manchester : Manchester Business School, 1993.

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H, LeBlond Paul, Endoh Masahiro et North Pacific Marine Science Organization., dir. Modelling of the subarctic North Pacific circulation (report of Working Group 7). Sidney, B.C : North Pacific Marine Science Organization, 1996.

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Grassini, Maurizio, et Rossella Bardazzi, dir. Structural changes, international trade and multisectoral modelling. Florence : Firenze University Press, 2008. http://dx.doi.org/10.36253/978-88-8453-740-9.

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In September 2007 the national team members of the International Inforum (Interindustry Forecasting Project at the University of Maryland) group held the XV annual World Conference in Truijllo, Spain. Such Conferences offer the participants to report their achievements in the different fields concerning the macroeconomic multisectoral modeling approach and data development. The national partners build their country model based on a common input-output accounting structure and a similar econometric modeling approach for sectoral and macroeconomic variables. In each Conference, the contributions refer to the wide spectrum of research activities carried on within the Inforum system of models.

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P, Odekerken M. E., Schmeets J. J. G et Pol, F. J. R. van de., dir. Developments and applications in structural equation modelli ng : Proceedings of the twelfth meeting of the "Working group structural equation modelling" ("A G Strukturgleichungsmodelle"). Amsterdam : Sociometric Research Foundation, 1991.

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Chapitres de livres sur le sujet "Grout modelling"

Bertolini, Luca, et Maddalena Carsana. « High pH Corrosion of Prestressing Steel in Segregated Grout ». Dans Modelling of Corroding Concrete Structures, 147–58. Dordrecht : Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0677-4_10.

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Masthoff, Judith. « Group Adaptation and Group Modelling ». Dans Intelligent Interactive Systems in Knowledge-Based Environments, 157–73. Berlin, Heidelberg : Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-77471-6_9.

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Garrido, José Luis, et Miguel Gea. « Modelling Dynamic Group Behaviours ». Dans Interactive Systems : Design, Specification, and Verification, 128–43. Berlin, Heidelberg : Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45522-1_8.

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Craigen, Dan. « Modelling Working Group Summary ». Dans Formal Methods in Systems Engineering, 81–87. London : Springer London, 1993. http://dx.doi.org/10.1007/978-1-4471-1975-3_9.

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Chervin, R., X. Jiang, J. Cherniawsky, Y. J. Han, H. Le Treut, T. Fichefet, P. Andrich, J. Mitchell, A. Jenkins et J. P. Van Ypersele. « Working Group 2 : Modelling ». Dans Climate-Ocean Interaction, 361–63. Dordrecht : Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2093-4_19.

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Grant, Jon. « Working Group Report : Modelling ». Dans Bivalve Filter Feeders, 549–55. Berlin, Heidelberg : Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78353-1_25.

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Fayolle, Guy, Roudolf Iasnogorodski et Vadim Malyshev. « The Case of a Finite Group ». Dans Probability Theory and Stochastic Modelling, 55–117. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50930-3_4.

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Ilyas, T., C. F. Leung, Y. K. Chow et Budi S. Soepandji. « Performance of laterally loaded pile group in clay ». Dans Physical Modelling in Geotechnics, 703–8. London : Routledge, 2022. http://dx.doi.org/10.1201/9780203743362-127.

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Carss, Marjorie. « Theme Group 6 : Applications and Modelling ». Dans Proceedings of the Fifth International Congress on Mathematical Education, 197–211. Boston, MA : Birkhäuser Boston, 1986. http://dx.doi.org/10.1007/978-1-4757-4238-1_16.

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Jablonsky, Josef. « Group Decision Making and Hierarchical Modelling ». Dans Lecture Notes in Economics and Mathematical Systems, 147–53. Berlin, Heidelberg : Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59132-7_16.

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Actes de conférences sur le sujet "Grout modelling"

Dalmalm, Thomas, et Håkan Stille. « Some Aspects on Grout Time Modelling ». Dans Third International Conference on Grouting and Ground Treatment. Reston, VA : American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40663(2003)124.

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Hongzhao, Liu, et E. Appleton. « Modelling and Analysis of a Grout Delivery Mechanism in the Remote Spray Lining of Shafts ». Dans ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dac-1445.

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Abstract A thorough analysis on the characteristics of a grout delivery mechanism in the lining of shafts has been accomplished. The dynamic equation of this spraying mechanism has been established and can describe the system’s performance properties under different conditions of viscous friction forces. The analysis introduces a combined viscous damping coefficient c* and a ratio λ between viscous friction force and inertia force. It is proved theoretically that the relative velocity of the grout is less than the implicate velocity and the emission angle α described in the paper is always larger than 45 °. Numerical simulations are performed by feeding various different parameters into the model. A full discussion of the effects of different variables is presented. Additionally, a formula for calculating the driving torque and power is developed. These studies provide an understanding of the properties of this mechanism and should prove useful in guiding its design and operation.

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Kataoka, T., K. Tanaka et and M. Hasegawa. « Interactive Model for Human Resource Planning in Operating a Group of Different Cycle Time ». Dans Modelling and Simulation. Calgary,AB,Canada : ACTAPRESS, 2010. http://dx.doi.org/10.2316/p.2010.696-034.

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Bochnacka, Dorota. « Industrial Group Production Program under Market Uncertainty ». Dans 9th Vienna Conference on Mathematical Modelling. ARGESIM Publisher Vienna, 2018. http://dx.doi.org/10.11128/arep.55.a55227.

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Rigopoulos, G., J. Psarras et N. V. Karadimas. « A Multiagent Model For Group Decision Support ». Dans 21st Conference on Modelling and Simulation. ECMS, 2007. http://dx.doi.org/10.7148/2007-0096.

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Chakraborty, Subrata, et Chung-Hsing Yeh. « Comparison Based Group Ranking Outcome for Multiattribute Group Decisions ». Dans 2012 UKSim 14th International Conference on Computer Modelling and Simulation (UKSim). IEEE, 2012. http://dx.doi.org/10.1109/uksim.2012.53.

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Kumar, Deepak, Ashutosh Srivastava et Suresh C. Gupta. « Routing in Ad Hoc Networks under Reference Point Group Mobility ». Dans 2013 European Modelling Symposium (EMS). IEEE, 2013. http://dx.doi.org/10.1109/ems.2013.99.

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Cavaleri, L., et L. H. Holthuijsen. « Wave Modelling in the WISE Group ». Dans 26th International Conference on Coastal Engineering. Reston, VA : American Society of Civil Engineers, 1999. http://dx.doi.org/10.1061/9780784404119.036.

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Fuentes-Fernández, Rubén, et Daniela Xavier. « Modelling Group Constructions for Social Analysis ». Dans 2016 Federated Conference on Computer Science and Information Systems. IEEE, 2016. http://dx.doi.org/10.15439/2016f547.

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« Uncertainty about uncertainty within a stakeholder group ». Dans 19th International Congress on Modelling and Simulation. Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2011. http://dx.doi.org/10.36334/modsim.2011.i9.chan.

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Rapports d'organisations sur le sujet "Grout modelling"

Nechaev, V., Володимир Миколайович Соловйов et A. Nagibas. Complex economic systems structural organization modelling. Politecnico di Torino, 2006. http://dx.doi.org/10.31812/0564/1118.

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One of the well-known results of the theory of management is the fact, that multi-stage hierarchical organization of management is unstable. Hence, the ideas expressed in a number of works by Don Tapscott on advantages of network organization of businesses over vertically integrated ones is clear. While studying the basic tendencies of business organization in the conditions of globalization, computerization and internetization of the society and the results of the ﬁnancial activities of the well-known companies, the authors arrive at the conclusion, that such companies, as IBM, Boeing, Mercedes-Benz and some others companies have not been engaged in their traditional business for a long time. Their partner networks performs this function instead of them. The companies themselves perform the function of system integrators. The Tapscott’s idea ﬁnds its conﬁrmation within the framework of a new powerful direction of the development of the modern interdisciplinary science – the theory of the complex networks (CN) [2]. CN-s are multifractal objects, the loss of multifractality being the indicator of the system transition from more complex state into more simple state. We tested the multifractal properties of the data using the wavelet transform modulus maxima approach in order to analyze scaling properties of our company. Comparative analysis of the singularity spectrumf(®), namely, the diﬀerence between maximum and minimum values of ® (∆ = ®max ¡ ®min) shows that IBM company is considerably more fractal in comparison with Apple Computer. Really, for it the value of ∆ is equal to 0.3, while for the vertically integrated company Apple it only makes 0.06 – 5 times less. The comparison of other companies shows that this dependence is of general character. Taking into consideration the fact that network organization of business has become dominant in the last 5-10 years, we carried out research for the selected companies in the earliest possible period of time which was determined by the availability of data in the Internet, or by historically later beginning of stock trade of computer companies. A singularity spectrum of the ﬁrst group of companies turned out to be considerably narrower, or shifted toward the smaller values of ® in the pre-network period. The latter means that dynamic series were antipersistant. That is, these companies‘ management was rigidly controlled while the impact of market mechanisms was minimized. In the second group of companies if even the situation did changed it did not change for the better. In addition, we discuss applications to the construction of portfolios of stock that have a stable ratio of risk to return.

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Mahat, Marian, et Wesley Imms. A Day in the Life of a Student : Facilitator Guide. University of Melbourne, 2020. http://dx.doi.org/10.46580/124325.

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A Day in the Life of a Student workshop is a design thinking workshop developed by DLR Group (an integrated design firm) and adapted by the Innovative Learning Environment and Teacher Change project at the University of Melbourne, Australia. The activities involve educators mapping out how one student spends his/her day in school and building a model of the learning environment based on this one student. With an emphasis on the visual learning that comes from modelling experiences, this workshop helps participants develop student-improvement focused practices in innovative learning environments.

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Lane, L. S., K. M. Bell et D. R. Issler. Overview of the age, evolution, and petroleum potential of the Eagle Plain Basin, Yukon. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/326092.

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New mapping, biostratigraphy, geochemistry, and organic petrology results have led to new insights into the structural evolution, depositional history, and resource potential of the Eagle Plain Basin. Apatite fission-track modelling resolves at least two distinct heating-cooling cycles and suggests that sediment was sourced from the east, as well as from the south. A recently identified marine-slope setting in the west of the basin represents a new petroleum play. Advances in understanding the age and depositional history of the Eagle Plain Group derive from new fossil localities, a new bentonite age, and detrital zircon data. Initiated in the Cenomanian, or possibly latest Albian, deposition continued until the late Maastrichtian, although post-Coniacian deposits may have been subsequently eroded, or bypassed across southern parts of the basin. New petroleum resource appraisals include new petroleum exploration-play concepts, as well as qualitative assessments of unconventional oil and gas potential.

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de Kemp, E. A. Canada in 3D - National Geological Surveys Committee update report. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331340.

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The Canada in 3D (C3D) project (https://canada3d.geosciences.ca/), formally initiated in the spring of 2020 by the National Geological Surveys Committee (NGSC) is required to provide a working group update to all its provincial and territorial partners. There have been several informal C3D working meetings with the partners prior to the creation of the C3D Charter and there has been a hiatus in communication through the Covid-19 pandemic. To re-engage the C3D community, a video tele-conference was held on June 6th, 2022 with approximately 44 participants. There was representation and presentations of all provinces and territories with various managers, technical and scientific observers. The purpose of this compilation of presentations and discussions from this 2022 C3D-NGSC reconnection meeting is to provide activity information to all participants, and their respective organizations, highlighting current geoscience compilation and modelling efforts in 2D and 3D. The aim is to help identify opportunities for collaboration on data standards, methods, applications and best practices but with the overall goal of working toward the C3D vision, outlined in the C3D charter of an updated 2D and 3D geological map/model of Canada.

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Atkinson, E. A. Regional mapping and qualitative petroleum resource assessment of the Magdalen Basin, Gulf of St. Lawrence, Quebec, Prince Edward Island, New Brunswick, Nova Scotia, and Newfoundland and Labrador. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331452.

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The Geological Survey of Canada conducted a broad regional study of the Magdalen Basin in the Gulf of St. Lawrence, as part of the Marine Conservation Targets initiative. MCT is a national initiative to protect more of Canada's offshore areas, and resource assessment and related regional mapping are part of the review process. This study assembled a large seismic and geologic database that allowed new regional mapping of several key horizons in this basin. Digital seismic data was donated by industry, and reprocessing undertaken both in-house and with contractors. Wells were correlated and tops from literature were used to indentify regional reflection packages. Regionally consistent two-way time interpretations add to confidence. Depth conversion used regional time-depth functions from literature, which were developed from refraction data, with a residual correction for the water column. Nine regional depth maps and eight isopach maps were produced, including Pre-Horton Basement, Horton Group Isopach, Base Windsor Group, Top Salt, Top Bradelle Formation, Bradelle / Cumberland Isopach, and Top Cable Head Formation. These maps illustrate that the Pre-Horton basement is about 15 km deep in the centre of the basin. Two main trends are visible in the Horton Grabens, which may relate to basin formation, and no significant reactivation of deeper Appalachian structure is observed. In the basin centre, the more robust Base Windsor Unconformity horizon reaches about 12 km deep, and a key reservoir and source sequence in the Bradelle Formation reaches 7 km. These maps are useful for considering regional stratigraphy. The new mapping also constrained basin models and became the input for our Qualitative Petroleum Potential map. Basin modelling reveals scenarios where oil may be preserved. The petroleum potential of the region is highest north of Îles de la Madeleine and southeast of Îles de la Madeleine and northwest of Cape Breton.

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Carter, T. R., C. E. Logan, J K Clark, H. A. J. Russell, E. H. Priebe et S. Sun. A three-dimensional bedrock hydrostratigraphic model of southern Ontario. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331098.

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A hydrostratigraphic framework has been developed for southern Ontario consisting of 15 hydrostratigraphic units and 3 regional hydrochemical regimes. Using this framework, the 54 layer 3-D lithostratigraphic model has been converted into a 15 layer 3-D hydrostratigraphic model. Layers are expressed as either aquifer or aquitard based principally on hydrogeologic characteristics, in particular the permeability and the occurrence/absence of groundwater when intersected by a water well or petroleum well. Hydrostratigraphic aquifer units are sub-divided into up to three distinct hydrochemical regimes: brines (deep), brackish-saline sulphur water (intermediate), and fresh (shallow). The hydrostratigraphic unit assignment provides a standard nomenclature and definition for regional flow modelling of potable water and deeper fluids. Included in the model are: 1) 3-D hydrostratigraphic units, 2) 3-D hydrochemical fluid zones within aquifers, 3) 3-D representations of oil and natural gas reservoirs which form an integral part of the intermediate to deep groundwater regimes, 4) 3-D fluid level surfaces for deep Cambrian brines, for brines and fresh to sulphurous groundwater in the Guelph Aquifer, and the fresh to sulphurous groundwater of the Bass Islands Aquifer and Lucas-Dundee Aquifer, 5) inferred shallow karst, 6) base of fresh water, 7) Lockport Group TDS, and 8) the 3-D lithostratigraphy. The 3-D hydrostratigraphic model is derived from the lithostratigraphic layers of the published 3-D geological model. It is constructed using Leapfrog Works at 400 m grid scale and is distributed in a proprietary format with free viewer software as well as industry standard formats.

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Corriveau, L., J. F. Montreuil, O. Blein, E. Potter, M. Ansari, J. Craven, R. Enkin et al. Metasomatic iron and alkali calcic (MIAC) system frameworks : a TGI-6 task force to help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329093.

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Australia's and China's resources (e.g. Olympic Dam Cu-U-Au-Ag and Bayan Obo REE deposits) highlight how discovery and mining of iron oxide copper-gold (IOCG), iron oxide±apatite (IOA) and affiliated primary critical metal deposits in metasomatic iron and alkali-calcic (MIAC) mineral systems can secure a long-term supply of critical metals for Canada and its partners. In Canada, MIAC systems comprise a wide range of undeveloped primary critical metal deposits (e.g. NWT NICO Au-Co-Bi-Cu and Québec HREE-rich Josette deposits). Underexplored settings are parts of metallogenic belts that extend into Australia and the USA. Some settings, such as the Camsell River district explored by the Dene First Nations in the NWT, have infrastructures and 100s of km of historic drill cores. Yet vocabularies for mapping MIAC systems are scanty. Ability to identify metasomatic vectors to ore is fledging. Deposit models based on host rock types, structural controls or metal associations underpin the identification of MIAC-affinities, assessment of systems' full mineral potential and development of robust mineral exploration strategies. This workshop presentation reviews public geoscience research and tools developed by the Targeted Geoscience Initiative to establish the MIAC frameworks of prospective Canadian settings and global mining districts and help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. The knowledge also supports fundamental research, environmental baseline assessment and societal decisions. It fulfills objectives of the Canadian Mineral and Metal Plan and the Critical Mineral Mapping Initiative among others. The GSC-led MIAC research team comprises members of the academic, private and public sectors from Canada, Australia, Europe, USA, China and Dene First Nations. The team's novel alteration mapping protocols, geological, mineralogical, geochemical and geophysical framework tools, and holistic mineral systems and petrophysics models mitigate and solve some of the exploration and geosciences challenges posed by the intricacies of MIAC systems. The group pioneers the use of discriminant alteration diagrams and barcodes, the assembly of a vocab for mapping and core logging, and the provision of field short courses, atlas, photo collections and system-scale field, geochemical, rock physical properties and geophysical datasets are in progress to synthesize shared signatures of Canadian settings and global MIAC mining districts. Research on a metamorphosed MIAC system and metamorphic phase equilibria modelling of alteration facies will provide a foundation for framework mapping and exploration of high-grade metamorphic terranes where surface and near surface resources are still to be discovered and mined as are those of non-metamorphosed MIAC systems.

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